GT4 Smart Bracelet 1.53 inch Smart Watch, Support Bluetooth Call NFC Heart Rate Major Functions: 1. High definition Bluetooth call, rest screen pointer, cover hand off screen, customized picture, APP background download picture, two-dimensional code (download, connect two in one), find mobile phone, calendar, movement track, restart, message push, remote photography, Alipay, sleep monitoring, blood sugar, altitude, temperature monitoring, weather, blood pressure, voice assistant, my two-dimensional code, key definition settings, blood oxygen, breathing, dial, step counting, timer Menu style, factory reset, settings (Lingdong Island, drainage, power saving mode, siren alarm sound, screen off time, wrist up and on, NFC, brightness, key definition, vibration intensity, don't disturb mode, password setting, language, time and date setting, connecting to APP, factory reset, restart, shutdown, about), phone (contact person, call record, dialing keyboard, call settings, emergency call), calculator, heart rate Language selection, watch information, alarm clock, sports mode, Bluetooth music, Bluetooth call, stopwatch, screen out time, vibration intensity, time and date settings, password lock. 2. Pull down menu: Bluetooth switch, Do Not Disturb mode, brightness adjustment, one key lock screen, weather, power off, payment code, Tiktok, Alipay, constant light setting, NFC, setting, alarm clock, vibration switch, menu style, factory restoration. 3. Slide up menu: Recent Tasks. 4. Right slide: split screen (weather, sleep, heart rate, blood pressure, blood oxygen, music, common applications). 5. Left slide: Add small programs (heart rate, blood pressure, sleep monitoring, blood oxygen, exhalation training, step counting, weather, music, and body temperature monitoring). 6. APP Software features: RDF 7. Watch language: - The first edition Language: Chinese, English, Portuguese, Polish, Dutch , Japanese, Traditional Chinese, Hebrew, Vietnamese, Thai, Malay, Burmese - Language of the second edition: English, Russian, Spanish, Germa